Thread: Order listings by custom metadata

Order listings by custom metadata

Hi! We're using the Vantage theme, and have added custom fields to our listings using the Custom Form tool. Each listing now has a "first name" and a "last name". (The title is a company name.) Is it possible to sort listings in search results by this last name metadata? We're currently using a child theme to modify Vantage.

I'm familiar with the process of using WP_Query to sort post output using metadata, for example:

But I'm not sure where I can adjust the post query in the child theme to get the results we're looking for. Any suggestions would be appreciated. Thanks!